15216464 has 10 divisors (see below), whose sum is σ = 29481930. Its totient is φ = 7608224.

The previous prime is 15216463. The next prime is 15216493. The reversal of 15216464 is 46461251.

It can be written as a sum of positive squares in only one way, i.e., 8456464 + 6760000 = 2908^2 + 2600^2 .

It is a super-4 number, since 4×15216464⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15216463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 475499 + ... + 475530.

It is an arithmetic number, because the mean of its divisors is an integer number (2948193).

Almost surely, 2^15216464 is an apocalyptic number.

It is an amenable number.

15216464 is a deficient number, since it is larger than the sum of its proper divisors (14265466).

15216464 is an equidigital number, since it uses as much as digits as its factorization.

15216464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951037 (or 951031 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 15216464 is about 3900.8286299195. The cubic root of 15216464 is about 247.8018708916.

The spelling of 15216464 in words is "fifteen million, two hundred sixteen thousand, four hundred sixty-four".